Export/import with ID values failing

Hi.

We have two AX2009 enviroments: A and B. Development is done in A and XPOs are exported with ID values and imported into B with ID values. So A is “master” for all object IDs.

Now, the B enviroment had to be restored from a backup a while ago and now the export/import with ID values doesn’t work anymore. For example, I export a new class from A with ID 100 and import it in B, with the ID value, and the class in B would have ID of 101. This only affects new objects.

Any idea how to solve this, other than deleting B and recreating it from A?